Nature: Frogs: The Thin Green Line, 7pm
It is the greatest mass extinction since the dinosaurs. Population by population, species by species, amphibians are vanishing off the face of the Earth. Despite international alarm and scientists scrambling for answers, the steady hemorrhaging of amphibians continues like a leaky faucet that cannot be fixed or a wound that will not heal. Large-scale die-offs of frogs around the world have prompted scientists to take desperate measures to try to save those they can.